diff --git a/tests/pp/02.expect b/tests/pp/02.expect
index 625c80b..f1fb927 100644
--- a/tests/pp/02.expect
+++ b/tests/pp/02.expect
@@ -1,6 +1,6 @@
 f(2 * (y+1)) + f(2 * (f(2 * (z[0])))) % f(2 * (0)) + t(1);
-f(2 * (2 +(3,4)-0,1)) | f(2 * (~ 5)) & f(2 * (0,1))^m(0,1);
+f(2 * (2+(3,4)-0,1)) | f(2 * (~ 5)) & f(2 * (0,1))^m(0,1);
 
 char c[2][6] = { "hello", "" };
 f(2 * (y+1)) + f(2 * (f(2 * (z[0])))) % f(2 * (0)) + t(1);
-f(2 * (2 +(3,4)-0,1)) | f(2 * (~ 5)) & f(2 * (0,1))^m(0,1);
+f(2 * (2+(3,4)-0,1)) | f(2 * (~ 5)) & f(2 * (0,1))^m(0,1);
diff --git a/tests/pp/14.c b/tests/pp/14.c
index 8611479..e15468c 100644
--- a/tests/pp/14.c
+++ b/tests/pp/14.c
@@ -1,11 +1,13 @@
-extern int printf(const char *format, ...);
-#define P ++
-#define n(x) x
+#define W Z
+#define Z(X) W(X,2)
+#define Y(X) Z(X)
+#define X Y
+return X(X(1));
 
-int main(void)
-{
-    int a = 0, b = -1;
-    int i1 = a P+P b;
-    printf("i1 = %d\n", i1);
-    return n(0x1e)n(-1);
-}
+#define P Q
+#define Q(n) P(n,2)
+return P(1);
+
+#define A (B * B)
+#define B (A + A)
+return A + B;
diff --git a/tests/pp/14.expect b/tests/pp/14.expect
index 138f97b..3786044 100644
--- a/tests/pp/14.expect
+++ b/tests/pp/14.expect
@@ -1,8 +1,3 @@
-extern int printf(const char *format, ...);
-int main(void)
-{
-    int a = 0, b = -1;
-    int i1 = a +++ ++ b;
-    printf("i1 = %d\n", i1);
-    return 0x1e -1;
-}
+return Z(Z(1,2),2);
+return Q(1,2);
+return ((A + A) * (A + A)) + ((B * B) + (B * B));
diff --git a/tests/pp/15.c b/tests/pp/15.c
deleted file mode 100644
index dc2b8d1..0000000
--- a/tests/pp/15.c
+++ /dev/null
@@ -1,26 +0,0 @@
-#define Y(x) Z(x)
-#define X Y
-X(1)
-X(X(1))
-X(X(X(X(X(1)))))
-
-#define A B
-#define B A
-return A + B;
-
-#undef A
-#undef B
-
-#define A B+1
-#define B A
-return A + B;
-
-#define A1 B1+1
-#define B1 C1+2
-#define C1 A1+3
-return A1 + B1;
-
-#define i() x
-#define n() 1
-i()i()n()n()i()
-i()+i()-n()+n()-
diff --git a/tests/pp/15.expect b/tests/pp/15.expect
deleted file mode 100644
index d3d3dd5..0000000
--- a/tests/pp/15.expect
+++ /dev/null
@@ -1,26 +0,0 @@
-
-
-Z(1)
-Z(Z(1))
-Z(Z(Z(Z(Z(1)))))
-
-
-
-return A + B;
-
-
-
-
-
-
-return A+1 + B+1;
-
-
-
-
-return A1+3 +2 +1 + B1+1 +3 +2;
-
-
-
-x x 1 1 x
-x+x-1 +1 -
diff --git a/tests/pp/Makefile b/tests/pp/Makefile
index ad97f9b..cd0b83f 100644
--- a/tests/pp/Makefile
+++ b/tests/pp/Makefile
@@ -3,6 +3,7 @@
 #
 
 TCC = ../../tcc
+
 TESTS = $(patsubst %.c,%.test,$(wildcard *.c))
 TESTS += $(patsubst %.S,%.test,$(wildcard *.S))
 
@@ -35,8 +36,8 @@ DIFF_OPTS = -Nu -b -B -I "^\#"
 clean:
 	rm -vf *.output
 
-02.test : DIFF_OPTS += -w
-15.test : DIFF_OPTS += -w
+# 02.test : DIFF_OPTS += -w
+# 15.test : DIFF_OPTS += -w
 
 # diff options:
 # -b ighore space changes